Jacob Grey Firearms 5.56 NATO Bolt Carrier Group BCGs Nitride Black

Jacob Grey Firearms 5.56 NATO Bolt Carrier Group BCGs Nitride Black. 223 Remington 5.56 NATO .300 Blackout & .350 Legend cartridges. This standard AR-15 bolt carrier is also machined from 9310/8620 Alloy Steel and is completed with a Smooth Nitride finish. This BCG comes with the ability to be fully-auto compatible and features forward assist notches. (For use with non-Jacob Grey Upper Receivers or any Mil-Spec Upper Receiver. MPI testing has also been done to ensure that there are no structural flaws to this BCG. The gas key is properly staked for additional safety. The Jacob Grey Nitride BCG houses many important parts such as the firing pin gas key cam pin extractor and bolt. With all these pieces working together the BCG has been manufactured to the highest degree of quality and precision so that it can withstand the force of an explosion from rounds such as the 300 Blackout 350 Legend or the more common 5.56 NATO round. Specifications for Jacob Grey Firearms 5.56 NATO Bolt Carrier Group (BCG): Manufacturer: Jacob Grey Firearms Color: Black Finish: Parkerized Fabric/Material: 9310 Steel 8620 Steel AISI 8740 Steel Cartridge: .300 AAC Blackout 5.56x45mm NATO .350 Legend .223 Remington Gun Make: AR Platform Gun Model: AR-15 M4 M16 Hand: Right Weight: 11.7 oz Length: 7.5 in Bolt Material: 9310 Steel Carrier Material: 8620 Steel Features of Jacob Grey Firearms 5.56 NATO Bolt Carrier Group: Bolt Carrier Style: M16 Full Auto; Gas Key: 8620 Steel attached with Grade 8 hardware properly staked sealed and QPQ Nitride; Extractor: Standard Mil-Spec and QPQ Nitride; Mil-Spec: Ejector Springs Firing Pin Retaining Pin Gas Rings O-Ring; Mil-Spec Heat Treated; Lifetime warranty Package Contents: Jacob Grey Firearms 5.56 NATO Bolt Carrier Group Jacob Grey Firearms 556NBCGN: 5.56 NATO Bolt Carrier Groups Nitride Black Jacob Grey Firearms 556NBCGN: 5.56 NATO Bolt Carrier Groups Nitride Black